EP0359670A3 - Dispositif de lecture par voie optique - Google Patents

Dispositif de lecture par voie optique Download PDF

Info

Publication number
EP0359670A3
EP0359670A3 EP19890402525 EP89402525A EP0359670A3 EP 0359670 A3 EP0359670 A3 EP 0359670A3 EP 19890402525 EP19890402525 EP 19890402525 EP 89402525 A EP89402525 A EP 89402525A EP 0359670 A3 EP0359670 A3 EP 0359670A3
Authority
EP
European Patent Office
Prior art keywords
light
objective lens
focused
recording medium
objective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890402525
Other languages
German (de)
English (en)
Other versions
EP0359670A2 (fr
Inventor
Masaaki Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Nidec Precision Corp
Original Assignee
Nidec Copal Corp
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP22839788A external-priority patent/JPH0278029A/ja
Priority claimed from JP22839988A external-priority patent/JPH0278025A/ja
Priority claimed from JP63228398A external-priority patent/JP2711457B2/ja
Application filed by Nidec Copal Corp, Fujitsu Ltd filed Critical Nidec Copal Corp
Publication of EP0359670A2 publication Critical patent/EP0359670A2/fr
Publication of EP0359670A3 publication Critical patent/EP0359670A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0932—Details of sprung supports

Landscapes

  • Optical Recording Or Reproduction (AREA)
EP19890402525 1988-09-14 1989-09-14 Dispositif de lecture par voie optique Withdrawn EP0359670A3 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP22839788A JPH0278029A (ja) 1988-09-14 1988-09-14 光ピックアップ装置
JP228399/88 1988-09-14
JP228398/88 1988-09-14
JP22839988A JPH0278025A (ja) 1988-09-14 1988-09-14 光ピックアップ装置
JP228397/88 1988-09-14
JP63228398A JP2711457B2 (ja) 1988-09-14 1988-09-14 光ピックアップ装置

Publications (2)

Publication Number Publication Date
EP0359670A2 EP0359670A2 (fr) 1990-03-21
EP0359670A3 true EP0359670A3 (fr) 1991-07-24

Family

ID=27331395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890402525 Withdrawn EP0359670A3 (fr) 1988-09-14 1989-09-14 Dispositif de lecture par voie optique

Country Status (2)

Country Link
US (1) US5017768A (fr)
EP (1) EP0359670A3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH077522B2 (ja) * 1990-01-31 1995-01-30 シャープ株式会社 レンズ駆動用支持体
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
NL9001492A (nl) * 1990-06-29 1992-01-16 Philips Nv Electro-optische aftastinrichting, alsmede optische speler voorzien van de aftastinrichting.
US5278401A (en) * 1991-08-13 1994-01-11 Asahi Kogaku Kogyo Kabushiki Kaisha Optical disc apparatus having five light receiving areas for detecting focus error and tracking error
US5561655A (en) * 1994-12-02 1996-10-01 Eastman Kodak Company Apparatus and method for differential tracking in a magneto-optic data storage system using mark edge detection
US6167006A (en) * 1995-03-31 2000-12-26 Kabushiki Kaisha Toshiba Optical information recording/reproducing apparatus based on tracking control of irradiated light
US5834766A (en) * 1996-07-29 1998-11-10 Ricoh Company, Ltd. Multi-beam scanning apparatus and multi-beam detection method for the same
JP2001034967A (ja) * 1999-07-23 2001-02-09 Pioneer Electronic Corp ピックアップ装置
JP2001201615A (ja) * 2000-01-21 2001-07-27 Sony Corp 光学素子および光ピックアップ
JP2004212205A (ja) * 2002-12-27 2004-07-29 Olympus Corp 角度検出装置、光信号スイッチシステムおよび情報記録再生システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997715A (en) * 1974-03-25 1976-12-14 Mca Disco-Vision, Inc. Focusing system for videodisc player
EP0111006A1 (fr) * 1982-05-31 1984-06-20 Sony Corporation Generateur de signaux de commande de tete optique
DE3604722A1 (de) * 1985-03-11 1986-09-11 Hitachi, Ltd., Tokio/Tokyo Vorrichtung zur ermittlung von fokussierfehlern
EP0206396A1 (fr) * 1985-06-10 1986-12-30 Koninklijke Philips Electronics N.V. Dispositif de balayage optique comprenant un système de détection d'une position de translation et d'une position angulaire pour un objectif suspendu électromécaniquement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801794A (en) * 1984-05-29 1989-01-31 Xerox Corporation Data detection and optical focus error detection system for rotating optical media
US4724533A (en) * 1984-06-15 1988-02-09 Matsushita Electric Industrial Co., Ltd. Optical head
JPS6282525A (ja) * 1985-10-08 1987-04-16 Toshiba Corp 光学ヘツド
JPS6315819A (ja) * 1986-07-04 1988-01-22 Toyobo Co Ltd ポリエステルの製造方法
JPS63261539A (ja) * 1987-04-20 1988-10-28 Mitsubishi Electric Corp 焦点検出装置
JPS63317930A (ja) * 1987-06-19 1988-12-26 Sharp Corp 光学ヘッド
US4843603A (en) * 1988-03-11 1989-06-27 Optotech, Inc. Concentric photodetector arrangement for focusing and tracking

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997715A (en) * 1974-03-25 1976-12-14 Mca Disco-Vision, Inc. Focusing system for videodisc player
EP0111006A1 (fr) * 1982-05-31 1984-06-20 Sony Corporation Generateur de signaux de commande de tete optique
DE3604722A1 (de) * 1985-03-11 1986-09-11 Hitachi, Ltd., Tokio/Tokyo Vorrichtung zur ermittlung von fokussierfehlern
EP0206396A1 (fr) * 1985-06-10 1986-12-30 Koninklijke Philips Electronics N.V. Dispositif de balayage optique comprenant un système de détection d'une position de translation et d'une position angulaire pour un objectif suspendu électromécaniquement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 51 (P-259)[1488], 8th March 1984; & JP-A-58 200 440 (SONY K.K.) 22-11-1983 *

Also Published As

Publication number Publication date
EP0359670A2 (fr) 1990-03-21
US5017768A (en) 1991-05-21

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